He's been charged with two counts in the suicides of a Canadian woman and a British man. Mark Drybrough, of Coventry, England, hanged himself in 2005, and 18-year-old Nadia Kajouji of Brampton, Ontario, drowned in Ottawa in 2008.
Melchert-Dinkel had been a nurse but was stripped of his license last year. His first court appearance is scheduled for May 25.
A message left at Melchert-Dinkel's home Friday wasn't immediately returned.
